Weft storage motion for shuttleless looms



July 23, 1968 w. ROHR WEFT STORAGE MOTION FOR SHUTTLELESS LOOMS a m 9 O m. NR S E Filed July 7, 1966 ATTORNEY July 23, 1968 w. ROHR WEFT STORAGE MOTION FOR SHUTTLELESS LOOMS 2 Sheets-Sheet 2 Filed July 7, 1966 PRIOR ART INVENTOR. WILLY Roi-4R W a M ATTORNEY United States Patent Oflice 3,393,709 Patented July 23, 1968 WEFT STORAGE MOTION FOR '-SHU'I"ILELESS LOOMS- K Willy Rohr, Brugg, Aargau, Switzerland, assign r, by

mesne assignments, to "John Donald Marshall and Horace L. Bomar, as trustees, of The Carolina Patent Development Trust Filed July 7, 1966, Ser. No. 563,599 3 Claims. (Cl. 139-122) ABSTRACT OF THE DISCLOSURE This application relates to a weft storage motion for a shuttleless loom and is an improvement over such a device disclosed in U.S. Application Ser. No. 352,869, filed on Mar. 18, 1964, now U.S. Patent 3,280,853.

The object of the invention is a weft storage motion for a shuttleless loom, said weft storage motion being provided with a continuously rotating weft storage cone, situated between a weft supply package and the weft control motion, having at least one end of the cone castellated and being provided with a pivotable thread guide disc, said thread guide disc being synchronised with the tape movement and pivoting to and from the weft storage cone, and having a thread guide hub projecting into the weft storage cone when the thread glide disc is at its innermost position and clearing the castellated end of the cone when the thread guide disc is at its outermost position.

The mechanism as described in the main patent winds the yarn onto its weft storage cone in coils having virtually the same distance one from another. When using certain types of weft material this manner of winding the coils has the disadvantage that the first coil does not immedi ately get a firm grip on the cone and slides off, thus reducing the length of the yarn stored on the cone. Furthermore when using the sames types of weft material as mentioned above the pulling-01f can cause several coils to slough-off towards the thread guide hub which again is not desired. The purpose of the invention is to eliminate the above described disadvantages.

According to the invention, this is obtained by a pivotable thread guide pivoting on a fulcrum stud and controlled by a control lever, being synchronized with the pullingoff and storing process, having an extension for guiding the weft between thread guide eyelet and thread guide disc hub in the innermost position of the thread guide disc.

The drawings show two embodiments of the invention:

FIG. 1 is a perspective view taken at the right-hand end of the loom and from the front thereof showing the weft storage cone and the thread guide;

FIG. 2 is a schematic view of the weft storage cone and the thread guide, the latter being in its outermost position, i.e., not in winding-up position;

FIG. 3 is a schematic view of the weft storage cone with thread guide disc and hub, the latter being in winding up position, however as comparison without the thread guide according to the invention;

FIG. 4 is a schematic view of the weft storage cone and the thread guide, the latter being in its innermost position, i.e., in winding-up position; and

FIG. 5 is a section-a1 view along the line V-V of FIG. 2 showing the thread guide extension according to another embodiment;

FIG. 1 shows the design of the mechanism according to the invention at a thread guide disc 1 of a weft storage motion of a shuttleless loom. A clamping means 2 is fixed by means not shown at the pivotable thread guide disc 1 which is controlled by control lever 9, the thread guide disc being provided to take the thread guide 3. The thread guide 3 can be mounted in the clamping means 2 either in a fixed or adjustable manner and is so designed that its vertically downward extending portion 4 preferably does not touch the weft 5 when this is extended from the thread guide eyelet 7 direct to the thread hub 6, as shown in FIG. 2.

FIG. 3 shows as a comparison a schematic view of the weft storage cone 8 with thread guide disc 1 and guide hub 6, however without the thread guide 3 according to the invention. The thread guide disc 1, controlled by control lever 9 is pivotable on a fulcrum stud 10 and takes a position in which the guide hub 6 enters the castellated front end of the weft storage cone 8. Thereby the weft 5 is caught by storage cone 8, which is rotating in the direction of the arrow, and as described earlier, the Weft is wound onto the cone in coils having virtually the same distance 13 from one another. This can lead to the aforementioned disadvantages.

FIG. 4 is a purely schematic view of the function of the mechanism according to the invention with 'weft storage cone 8 and thread guide 3, where the guide disc 1 is pivoted on the fulcrum stud 10 by control lever 9 so that the guide hub *6 enters the castellated front end 11 of the storage cone 8. Thereby the weft 5 is caught by the storage cone 8, rotating upon a horizontally disposed and forwardly directed cone shaft 12 in direction of arrow, and due to the position of the thread guide 3 with its extension 4 is then wound after a steep initial coil 15 in coils 17 which are nearly at right angles to the axis 16 of the storage cone and generally parallel with a raised annular hub 14 formed as a part of the storage cone 8.

The control lever 9 may be actuated by mechanical, pneumatic, hydraulic or electromagnetic means.

FIG. 5 shows as a further embodiment a partial section of the thread guide 3 and its extension 4, the latter being provided with a weft eyelet 18. In deviation of the embodiment as shown in FIGS. 2 and 4, the weft 5 may be guided through the eyelet 18 and thereby be under positive control of the thread guide 3, 4.

The advantage of the described invention lies in the fact that after a steep initial coil the weft is wound onto the storage cone in coils which are nearly at right angles to the axis of the storage cone thereby giving the yarn a better grip on the storage cone.

While one embodiment and a modification of the invention have been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. This invention is, therefore, not to be limited to the precise detail-s described, but is intended to embrace all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

I claim:

1. A weft storage motion for a shuttleless loom comprising ar p w s y rqt r abl nwe ts q as seas ns and of which is castellated, (b) a thread guide control member pi'votable toward and away from said castellated end of said cone, (0) a thread guide hub on said guide control member movable into and out of said castellated end, and (d) a pivotable thread guide movable in synchronisrn with said thread guide control member and hub for guiding weft yarn to the innermost end of said weft storage end. 2. A weft storage motion according to claim 1 wherein said thread guide is adjustably mounted.

3. A weft storage motion according to claim 1 wherein said thread guide includes an eyelet f0r guiding the weft yarn.

*"a-ssaggos UNITED STATES PATENTS 3,194,276 7/1965 Krukonis et a1. 139122 5 3,276,484 10/1966 Bucher 139-122 3,280,853 10/1966 Brown .139122 FOREIGN PATENTS m 234,607 7/1964 Austria.

7/1963 Erance r ROBERT Era miner. 

